13887681477 has 16 divisors (see below), whose sum is σ = 18706920960. Its totient is φ = 9163546992.

The previous prime is 13887681473. The next prime is 13887681503. The reversal of 13887681477 is 77418678831.

It is not a de Polignac number, because 13887681477 - 2² = 13887681473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13887681477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887681473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 602674 + ... + 625292.

It is an arithmetic number, because the mean of its divisors is an integer number (1169182560).

Almost surely, 2^13887681477 is an apocalyptic number.

It is an amenable number.

13887681477 is a deficient number, since it is larger than the sum of its proper divisors (4819239483).

13887681477 is a wasteful number, since it uses less digits than its factorization.

13887681477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24712.

The product of its digits is 12644352, while the sum is 60.

The spelling of 13887681477 in words is "thirteen billion, eight hundred eighty-seven million, six hundred eighty-one thousand, four hundred seventy-seven".